tests/topotests/bgp_minimum_holdtime/test_bgp_minimum_holdtime.py

   1 #!/usr/bin/env python
   2 # SPDX-License-Identifier: ISC
   3
   4 # Copyright (c) 2021 by
   5 # Takemasa Imada <takemasa.imada@gmail.com>
   6 #
   7
   8 """
   9 Test if minimum-holdtime works.
  10 """
  11
  12 import os
  13 import sys
  14 import json
  15 import pytest
  16 import functools
  17
  18 CWD = os.path.dirname(os.path.realpath(__file__))
  19 sys.path.append(os.path.join(CWD, "../"))
  20
  21 # pylint: disable=C0413
  22 from lib import topotest
  23 from lib.topogen import Topogen, TopoRouter, get_topogen
  24
  25 pytestmark = [pytest.mark.bgpd]
  26
  27
  28 def build_topo(tgen):
  29     for routern in range(1, 3):
  30         tgen.add_router("r{}".format(routern))
  31
  32     switch = tgen.add_switch("s1")
  33     switch.add_link(tgen.gears["r1"])
  34     switch.add_link(tgen.gears["r2"])
  35
  36
  37 def setup_module(mod):
  38     tgen = Topogen(build_topo, mod.__name__)
  39     tgen.start_topology()
  40
  41     router_list = tgen.routers()
  42
  43     for i, (rname, router) in enumerate(router_list.items(), 1):
  44         router.load_config(
  45             TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
  46         )
  47         router.load_config(
  48             TopoRouter.RD_BGP, os.path.join(CWD, "{}/bgpd.conf".format(rname))
  49         )
  50
  51     tgen.start_router()
  52
  53
  54 def teardown_module(mod):
  55     tgen = get_topogen()
  56     tgen.stop_topology()
  57
  58
  59 def test_bgp_minimum_holdtime():
  60     tgen = get_topogen()
  61
  62     if tgen.routers_have_failure():
  63         pytest.skip(tgen.errors)
  64
  65     def _bgp_neighbor_check_if_notification_sent():
  66         output = json.loads(
  67             tgen.gears["r1"].vtysh_cmd("show ip bgp neighbor 192.168.255.2 json")
  68         )
  69         expected = {
  70             "192.168.255.2": {
  71                 "connectionsEstablished": 0,
  72                 "lastNotificationReason": "OPEN Message Error/Unacceptable Hold Time",
  73                 "lastResetDueTo": "BGP Notification send",
  74             }
  75         }
  76         return topotest.json_cmp(output, expected)
  77
  78     test_func = functools.partial(_bgp_neighbor_check_if_notification_sent)
  79     success, result = topotest.run_and_expect(test_func, None, count=40, wait=0.5)
  80     assert result is None, "Failed to send notification message\n"
  81
  82
  83 if __name__ == "__main__":
  84     args = ["-s"] + sys.argv[1:]
  85     sys.exit(pytest.main(args))